Starter for internal-combustion engines.



P. J. BORDEAUX.

STARTER POR mums/xi. wmmml hmmm.

P. J. BORDEAUX. STARTER POR INTERNAL GOMBUSTION ENGINES.

APPLICATION FILED APR,24.1S13.

Patented Feb. 9, 1915 2 SHEETSfSHBET 2.

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T all 'whom it may concern.'

g following is a specification.

'UNITED STATES .PATENT OFFICE.

FOSTER i. BORDEAUX, oF Bosm'n, mssalusmms, AssIGN'oR 'ro montarlo APPLIANCE C OMPANY, O QOSTON,

I MASSACHUSETTS.

MASSACHUSETTS, A. CORPORATION OF STARTER Foa m'rnxmancmtrsrmurmginns.

Specification of Letteysllaten Y application mea Aprile@ raie'. serialno. 763,'1'97.

My invention consists in improvements in starting devicesfor internal combustion engines and comprises devices lwhich automatically disengage the starter from the engine shaft in case' of premature firing,

"and also automatic devices toreduce the cured to the Wheel W at B.

liability of premature firing taking place.

-Other details of 'my improvements will appear from the specification 'which follows.

ln. the drawings hereto annexed which illustrate my improved. engine starter, Figure I is a front elevation of a portion of an engine casing with the starter devices'4 applied. thereto; Fig. 2 is a .plan view of the same; Fig. 3 is a vertical longitudinal section on a larger scaleV showing the end of -the engine shaft' with portions of the starting mechanism attached thereto; Fig. 4 is a verticalveross section of the same; and Fig. 5 is a detail view on an enlarged scale showing a portion of the starting mechanism. A

Referring first to Figs. 1 and' 2, C represents the 'front plate of the crankfcase'casting of an automobile engine. To this'f-ront plate upon'a suitable bracket :A there is journaled the wheel lV which is grooved to carry the cord or belt B, the latter being se- Secured to and preferably integral with the wheel W there is providedv the chainpinion A and the spark retarding cam A2, the chain D being secured to the chain pulley A' at Aj.

attach the starting device, the crank shaft S is cut cH: at a point closer to the engine .casing C than is usual, to provide space between the shaft S and the usual cranking shaft C4 for the starting. mechanism. The shaft S receives the member E which is secured to the shaft, as by a pin E', this member having which is,n in effect, a prolongation of the shaft S. On the outer erfd vof thefstud E2 there secured the ring ratchet C2 with its teeth by means of the pin E3," this ring a stud portion E2,-

lntcliet being adapted to receive thefteeth p1' pins on the cranking shaft usual manner. A pulley Fis journaled to turn freely on the shaft extension `E*,.and

is preferably mounted thereon Aby means of. ba l y Patented Feb., 9,

o* intiem bearings. The shaft extension E* has ormed upon it ratchet teetl1,E, which are' adapted to coact with the pavwilfF which is Apivoted at Fon the pulley F, which' is chambered at F 2 the pawl F.. vThis pawl has a single'tooth Ff to engage with the teeth -E ratchet on the shaft extension Eef 'Morea o ver, .the awl F is a pulling pawl, as dis-l tinguishe from a pushing pawl; Vthe'pivot F*l being in advance ofthe tooth F* in the directionof rotation when the shaft S is bein The employment of a pulling pawl facili tates disengagemeutof the engaged teeth, Ff* and E* ifhv chance the engine should reverse fire. As the pivot F3 lies outside the to provide .a housing for of Athe rotated by-means of the pawl F.

periphery ofthe ratchet extension E, the

relative movement of the ffaces of the teeth F4 and E4, during disengageinentis not a rubbing movement, but one of clearance.

The means to rotate the pulley are represented by the chain D securedV to the chain pinion A at A3 and to theV pulley F at D. Vhexi the cord B (which may extend back -through the dash of ,an autornobile)"v is pulled, the chain D rotates the pulle in a right-handed or clockwise direction, as viewed in Figs. 1 and 4. A retaining finger L is secured to the pulley F and is provided with a projection L' which overlies the extension F on the pawl F', and a spring K attached to the retaining finger -Lstresses the pulley F in a left-'handed direction or` anti-clockwise, as viewed in Figs. 1 and 4.

The normal direction of rotation of the shaft S in. the instance illustrated is righthanded or clockwise kas viewed in Figs. 1

Then by means of the chain D the pulley F is rotated, the pawl F both by its own welght and also by the action of the projecjtion L" on the retaining finger L, moves its tooth F into engagement with one of the. ratchet teeth E* of the shaft extension E2' and thus the engine shaft S is rotated When the pull on the cord or beltB is re leased, fthe spring K draws `the retaining finger L downen and carries with it the p'lw'l 1'2" by ifneninsA of the overlying projection L@ until the extension l?? ofthe pziwl I le" strikes the edge G of the releasing stop G, this hitter being so termed as to constitute :i housing unil protection below the pulley l". T he shape of the ratchet teeth E4 and the locution of the pivot F outside ot' the shaft extension l, causes the tooth F* te more outward in `i circullirrputh, so that the inoxement et the tooth l is one of retraction from 2t intehet tooth Ff. This mfn'enient it retraction inznle possible by ming n, pulling parti as tliatinguishetl from :i pushing pziwl7 :ind locating the pewl pivot outside the ratchet perilrihery.

lf, Y chance, ihe enginev should bucloire so :is to "i te' the shalt S n reve-rse Inovenienh the pnll" will he turned sharply in the reverse direction intl "'ill inatnntly muse. extension lf to collide with the releasing stop t." enti thus tlisengtige the pun-l troni 'l e rnhbhet tomh l with which it was I eil when the chain lS was opm-:.l,etl. ln order to guard against accidentel of thisy gort, the Spark inier l is provided with n returning her which, 'when the col-l or belt l lrzm'n5 pushed by the spark returtling cuni n. to such :i position that the l retarde; the spark.

e extension ll, he: shown in the tlruwin may with convenience be inside. to suppiy the pince et a llin-loelt pulley which muy he #lipped on the larger portion of the eX 'tenSion liivlieaethrough the pin l pai-ases.

Ml the working piirts of the Starter :there des; ripeti, are so attached as to partake of any movement olf the engine liaise relatively to the 'framework on which it is Suspended, so that no oscillations or movements of the engine e. whole can affect the starter, or tlisarrange the relationsl'iip of its parts. An exception to this may he furnished by the member G, which may be attached to the automobile frame, und not to the engine,

the

Without materially affecting the operation ot the starter.

1. In n starter for internal comliuf'etion engines-fthe combination oi' the engixhA durft, :i pulleyY mounted to turn en sziitl Shah, :i ratchet on the shaft inclosetl hy the pulley,

slid pulley being chumheretl through port of its circumference to form a houeing for :i pzwfl', the ptiwl` housed in the pulley cimmber und pivotetl near the periphery of the pulley and having a projection extending beyond the periphery of the pulley; u stop external to the pulley, to cozict with the pawl projection und tlisengnge the pnwl Afrom the. shaft ratchet, means to turn the "pulley, :md menne to engage the pewl und ratchet when the pulley ir' turnetl in engine-*starting tlirec tion.

ln :i stinter yfor internzil combustion engines, the coinliinntion of the engine shaft, :i pulley mounted to turn on Suid slnitt, :i rntchet on the shaft inclosed .by the pulley, snitl pulley heilig chnniliered through part of its. circumference to 'form a housingfor e pinrl, the pziwl, housed in the pulley cheniher und pivoted neer the periphery of the Vpulley und having a projection extending beyond the periphery ot' the pulley` u top external to the pulley, to cenet with the pnwl projection und disengage the pnwl from the shaft ratchet, ineens to turn the pulley, and. means to engage the pnwl and ratchet when the pulley is turned in engine-starting tlirec tion, said pulley turningf menus comprising devices; to retard the spurl; timer when the seid pulley is turned in engine starting drection.

Signed hy me :it Boston, Massachusetts, this 17th clay of April 1913.

FOSTER J'. BORDEAUX.

fitnesses 1 Oman ROBERTS5 ADAMS D. CLAFLIN. 

